<template>
    <div v-if="!item.hidden">
      <template v-if="hasOneShowingChild(item.children, item) && (!onlyOneChild.children || onlyOneChild.noShowingChildren) && !item.alwaysShow">
        <app-link v-if="onlyOneChild.meta" :to="resolvePath(onlyOneChild.path, onlyOneChild.query)">
          <el-menu-item :index="resolvePath(onlyOneChild.path)" :class="{ 'submenu-title-noDropdown': !isNest }">
            <svg-icon :icon-class="onlyOneChild.meta.icon || (item.meta && item.meta.icon)"/>
            <template #title><span class="menu-title" :title="hasTitle(onlyOneChild.meta.title)">{{ onlyOneChild.meta.title }}</span></template>
          </el-menu-item>
        </app-link>
      </template>

      <el-sub-menu v-else ref="subMenu" :index="resolvePath(item.path)" popper-append-to-body>
        <template v-if="item.meta" #title>
          <svg-icon :icon-class="onlyOneChild.meta.icon || (item.meta && item.meta.icon)"/>
          <span class="menu-title" :title="hasTitle(item.meta.title)">{{ item.meta.title }}</span>
        </template>
        <sidebar-item
          v-for="child in item.children"
          :key="child.path"
          :is-nest="true"
          :item="child"
          :base-path="resolvePath(child.path)"
          class="nest-menu"
        />
      </el-sub-menu>
    </div>
</template>

<script setup>
// import svgIcon from "@/components/SvgIcon"
import path from 'path-browserify'
import { isExternal } from '@/utils/validate'
import AppLink from './Link'
import { ref } from "vue";
const props = defineProps({
  item: {
    type: Object
  },
  basePath: {
    type: String,
    default: "",
  },
  isNest: {
    type: Boolean
  }
})

const onlyOneChild = ref({});

function hasOneShowingChild(children = [], parent) {
  if (!children) {
    children = [];
  }
  const showingChildren = children.filter(item => {
    if (item.hidden) {
      return false
    } else {
      // Temp set(will be used if only has one showing child)
      onlyOneChild.value = item
      return true
    }
  })

  // When there is only one child router, the child router is displayed by default
  if (showingChildren.length === 1) {
    return true
  }

  // Show parent if there are no child router to display
  if (showingChildren.length === 0) {
    onlyOneChild.value = { ...parent, noShowingChildren: true }
    return true
  }

  return false
};

function resolvePath(routePath, routeQuery) {
  if (isExternal(routePath)) {
    return routePath;
  }
  if (isExternal(props.basePath)) {
    return props.basePath;
  }
  if (routeQuery) {
    let query = JSON.parse(routeQuery);
    return { path: path.resolve(props.basePath, routePath), query: query };
  }
  return path.resolve(props.basePath, routePath)
}

function hasTitle(title){
  if (title.length > 5) {
    return title;
  } else {
    return "";
  }
}
</script>
